Atoms and Periodic Table

Front

What does the atomic number represent in an atom?

Back

The atomic number represents the number of protons in the nucleus of an atom.

Front

What are the horizontal rows on the periodic table called?

Back

Periods.

Front

What are the vertical columns on the periodic table called?

Back

Groups.

Front

Which element is represented by the symbol 'He'?

Back

Helium.

Front

What is the significance of valence electrons in an atom?

Back

Valence electrons determine how an atom can bond with other atoms.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

How many valence electrons does Calcium (Ca) have?

Back

Calcium has 2 valence electrons.

Front

What particles contribute to the mass of an atom?

Back

Protons and neutrons in the nucleus.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Tags

NGSS.MS-PS2-3